how to make thornmail not useless.
It's already pretty solid, it's a more cost-effective
that's better than
against a decent number of champions. It's just niche because it's power doesn't translate to an entire team comp as smoothly ~80% of the time.
The only issue I've ever really seen anyone raise with Thornmail is also that it doesn't counter a 15k build from a hyper carry and allow anyone who buys it to AFK kill them.
Which it obviously doesn't do, because that would be stupid.
turn it into blademail from dota2. 100% balanced.
Blademail is fairly BS in DotA, and that game allows items to offer things like 14 seconds of stealth, 10 seconds of immunity to all magic damage and CC effects, re-setting all your cooldowns with the click of a button for 2 full QWER rotations, 7% max HP regenerated per second, and similar shenanigans in their itemization, which should say something.
Itemization between LoL and DotA isn't in the same ball-park in terms of power, both have very different philosophies and power levels. And true to DotA items, Blademail would be completly broken moved over to LoL.